Frequency Frequency distributiondistribution Subject-Math'S Subject-Math'S School-KendriyaSchool-Kendriya VidyalayaVidyalaya

frequencyfrequency !!!!• FrequencyFrequency, terM uSed in the , terM uSed in the

phySical ScienceS to denote phySical ScienceS to denote the nuMber oF tiMeS that any the nuMber oF tiMeS that any regularly recurring regularly recurring phenoMenon occurS in one phenoMenon occurS in one Second.Second.

Class intervalsClass intervals !!!!• Class IntervalClass Interval, , In statIstICs, the In statIstICs, the

rangerange of eaCh Class of data, used of eaCh Class of data, used when dealIng wIth large amounts when dealIng wIth large amounts of data. to obtaIn an Idea of the of data. to obtaIn an Idea of the dIstrIbutIon, the data are broken dIstrIbutIon, the data are broken down Into ConvenIent Classes, whICh down Into ConvenIent Classes, whICh must be mutually exClusIve and must be mutually exClusIve and are usually equal.are usually equal.

• for, examplefor, example - 1-10,10-20,20-30.1-10,10-20,20-30.

Tally marksTally marks !!!!• To get a particular information from the

given data can be arranged in tabular form using tally marks

Frequency distribution table !!!!

• A frequency-distribution tAble summArizes dAtA

for, exAmple-

subject subject tAlly mArkstAlly mArks mArksmArksmAth 5

science 10

english 4

hindi 2

Example -Example -

questionquestion -- construct A frequency construct A frequency

distribution tAble for the distribution tAble for the given dAtA on weight (in kg) given dAtA on weight (in kg) of 20 student of A clAss using of 20 student of A clAss using intervAls 30-40,40-50,50-60intervAls 30-40,40-50,50-60.

Answer -ClassClass

intervalsintervalstally tally marksmarks

frequenCyfrequenCy

30-40 7

40-50 9

50-60 2

60-70 2

THANKS FOR YOUR THANKS FOR YOUR KIND KIND CONSIDERATION CONSIDERATION

made. By –ajay kumarmade. By –ajay kumar